Mask liner



FIG. 1 is a top view of a mask liner;

FIG. 2 is a bottom view of the mask liner of FIG. 1;

FIG. 3 is a top perspective view of the mask liner of FIG. 1;

FIG. 4 is a bottom perspective view of the mask liner of FIG. 1;

FIG. 5 is a top view of the mask liner of FIG. 1 showing one of the tabs being folded;

FIG. 6 is a bottom view of the mask liner of FIG. 5;

FIG. 7 is a top perspective view of the mask liner of FIG. 5;

FIG. 8 is a further top perspective view of the mask liner of FIG. 5;

FIG. 9 is a bottom perspective view of the mask liner of FIG. 5; and,

FIG. 10 is a further bottom perspective view of the mask liner of FIG. 5.

The broken lines on the mask liner depict stitching and form no part of the claim. 

CLAIM I claim the ornamental design for a mask liner, as shown and described. 